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The s-block metals are never found pure because of their:
AHigh reactivity
BLow atomic mass
CLarge ionic size
DWeak metallic bond
Answer & Solution
Correct answer: A. High reactivity
1. These metals react readily with what surrounds them.
2. So they occur combined rather than free.
3. Their high reactivity is the reason.
_Source: NCERT Class 11 Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._
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